Inventor
FARBER SHELDON
US12 patents
⚠️ This page may combine multiple inventors who share the name “FARBER SHELDON”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NCR CO
8 patentsUS4119776AOct 10, 1978
Vinyl phthalide color formers
NCR CO20 citations81
US4107428AAug 15, 1978
Di-vinyl color formers
NCR CO19 citations81
US4022771AMay 10, 1977
Aminophenyl lactone compounds containing an ethyleno group
NCR CO20 citations81
US4020056AApr 26, 1977
Di-vinyl phthalides color formers
NCR CO25 citations81
US4026883AMay 31, 1977
Derivatives of dianhydrides as vinyl color formers
NCR CO8 citations73
US4020068AApr 26, 1977
Chromogenic furoquinoxalines
NCR CO15 citations73
US4016174AApr 5, 1977
Benzoindole phthalides
NCR CO5 citations62
US4035393AJul 12, 1977
Chromogenic derivatives of bis-1,1-disubstituted ethylene and a process for preparing them
NCR CO1 citations51
APPLETON PAPER INC
4 patentsUS4334072AJun 8, 1982
Lactone compounds containing an indolizine radical
APPLETON PAPER INC17 citations72
US4275206AJun 23, 1981
Lactone compounds containing an indolizine radical
APPLETON PAPER INC9 citations72
US4242513ADec 30, 1980
Lactone compounds containing a heterocyclic radical
APPLETON PAPER INC8 citations72
US4232887ANov 11, 1980
Lactone compounds containing an indolizine radical
APPLETON PAPER INC1 citations51